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Two articles, two issues. The first, an asteroid that (unlikely) may hit the earth on the first day of spring, the Feast of Ishtar, 2014. The second, a space program called "Ishtar" (Internal Structure High-resolution Tomography by Asteroid Rendezvous)that is intended to deter NEO (near earth objects) from colliding with the earth.
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www.theage.com.au/articles/...08365.html
Asteroid heads for Earth
September 2, 2003
Scientists were today warning of a possible asteroid collision with the Earth.
An asteroid around 1.2 km wide could hit the earth on March 21, 2014 and has been classified as "an event meriting careful monitoring" by astronomers.
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spaceguard.esrin.esa.int/tumbl...ar.htm
The ISHTAR project
by P. D'Arrigo - Copyright Tumbling Stone 2002
ISHTAR (Internal Structure High-resolution Tomography by Asteroid Rendezvous) is a proposed mission to image the interior of an asteroid using a powerful new technology: Radar Tomography (that is, the imaging of the interior of a solid object using ground-penetrating radar). The ISHTAR mission design is centred around this Radar Tomography payload, capable to probe the interior of a small asteroid to depths of 100-200m, combined with an imager for surface characterization and a radio science experiment to measure the asteroid mass.
An artistic impression of ISHTAR mission (copyright Astrium) This unique combination will allow the first detailed characterization of a NEO (near earth objects) and will give valuable insights into the origin and evolution processes that govern the NEO population. In particular, ISHTAR will address key issues related to the threat NEOs pose to Earth:
It will help assess the impact hazard, by providing the first data on the internal structure of stony NEOs, helping to predict the likelihood of NEO fragmentation on entering the atmosphere and to solve the debate between ‘rubble pile’ and ‘solid rock’ models of NEOs.
It will give us knowledge of the fractures and voids inside the NEO and will provide the basis for devising mitigation techniques, by helping to discriminate between destructive and deflective strategies.
It will greatly advance our understanding of the origin and evolution of NEOs, by giving us vital clues about the formation of stony NEOs and their parent bodies, the age and the collisional history of NEOs.
__________________________________________________
www.theage.com.au/articles/...08365.html
Asteroid heads for Earth
September 2, 2003
Scientists were today warning of a possible asteroid collision with the Earth.
An asteroid around 1.2 km wide could hit the earth on March 21, 2014 and has been classified as "an event meriting careful monitoring" by astronomers.
___________________________________________________
spaceguard.esrin.esa.int/tumbl...ar.htm
The ISHTAR project
by P. D'Arrigo - Copyright Tumbling Stone 2002
ISHTAR (Internal Structure High-resolution Tomography by Asteroid Rendezvous) is a proposed mission to image the interior of an asteroid using a powerful new technology: Radar Tomography (that is, the imaging of the interior of a solid object using ground-penetrating radar). The ISHTAR mission design is centred around this Radar Tomography payload, capable to probe the interior of a small asteroid to depths of 100-200m, combined with an imager for surface characterization and a radio science experiment to measure the asteroid mass.
An artistic impression of ISHTAR mission (copyright Astrium) This unique combination will allow the first detailed characterization of a NEO (near earth objects) and will give valuable insights into the origin and evolution processes that govern the NEO population. In particular, ISHTAR will address key issues related to the threat NEOs pose to Earth:
It will help assess the impact hazard, by providing the first data on the internal structure of stony NEOs, helping to predict the likelihood of NEO fragmentation on entering the atmosphere and to solve the debate between ‘rubble pile’ and ‘solid rock’ models of NEOs.
It will give us knowledge of the fractures and voids inside the NEO and will provide the basis for devising mitigation techniques, by helping to discriminate between destructive and deflective strategies.
It will greatly advance our understanding of the origin and evolution of NEOs, by giving us vital clues about the formation of stony NEOs and their parent bodies, the age and the collisional history of NEOs.
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